$4-12i-9-125-150i-60i^3$
$4^212xy^2+9y^4$
$14.530+-365$
$\cos^2\left(x\right)dx=\tan^2\left(y\right)dy$
$\left(\frac{x}{x+9}\right)-\left(x^3\right)$
$\left(8a+9ab\right)\left(6a+3ab\right)$
$x^2-5x-5=0$
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